selkäydinhermoja
Selkäydinhermo, also known as spinal nerve, is a nerve that originates from the spinal cord. There are 31 pairs of spinal nerves in the human body, which are classified into cervical, thoracic, lumbar, sacral, and coccygeal nerves based on their origin in the spinal cord. Each spinal nerve is a mixed nerve, meaning it contains both sensory and motor neurons.
Sensory neurons transmit impulses from sensory receptors in the body to the spinal cord and brain, allowing
The spinal nerves play a crucial role in the peripheral nervous system. They connect the spinal cord